The host at this IP address is running a malware botnet controller which is being used to control infected computers (bots) around the globe using a trojan horse.
Malware botnet controller located at 23.100.23.67 on port 80 (using HTTP GET):
hXXp://hostas4.cf/click.php
$ dig +short hostas4.cf
23.100.23.67
Other malicious domain names hosted on this IP address:
hostas4.cf 23.100.23.67
hostas5.ml 23.100.23.67